High-load biological filter tank sewage water treating method capable of backwashing

Abstract

The invention relates to a high load trickling filter of the environmental protection technology field, which can backwash. Pretreated wastewater is sprayed evenly by a water distributor from a water inlet onto a strengthened water distributing layer on the uppermost of a novel high load biological filter which can backwash. After the secondary distribution of the strengthened water distributing layer, the inlet water reaches a filter media layer. Through the secondary distribution of the strengthened water distributing layer, inlet water reaches to a material filtering layer. Sewage is purified under the effect of a comprehensive purification function. Outlet water which passes through the main material filtering layer is discharged by a supporting layer into a water tank. When a filter tank operates for a period and the inside of the filtering material is blocked, eight blow vents and the water inlet and the water outlet of the filter tank are closed for the backwashing. The invention on one hand can effectively overcome defects of the prior art that the treatment effects are greatly influenced by hydraulic loads, the filter is easy to be blocked, etc. the treatment efficiency is greatly improved and the operation condition is improved. On the other hand, the invention has the characteristics of simple management, low capital construction and operation fee and no secondary pollution.

Description

technical field [0001] The invention relates to a method in the technical field of sewage treatment, in particular to a backwashable high-load biological filter sewage treatment method. Background technique [0002] In recent years, with the development of economy and society, environmental problems have become increasingly prominent, and sewage treatment is very urgent not only in cities but also in rural areas. Many township enterprises are small in scale, scattered in location, and require large investment in waste water treatment facilities. Enterprise waste water is discharged at will without proper treatment. Traditional processes represented by activated sludge process, such as anaerobic / aerobic process (A / O), anaerobic / facultative / aerobic process (A 2 / O), Sequencing Batch Activated Sludge Process (SBR), etc. Although the technologies are relatively mature, the expensive construction cost and operation and management costs limit their wide application, especially in...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to address the deficiencies in the prior art, to provide a backwashable high-load biological filter sewage treatment method, so that it can provide a kind of method for scattered residential areas such as urban residential quarters, townships, township enterprises, and urban and rural industrial parks. The water treatment method, on the one hand, can effectively overcome the shortcomings of the prior art that the treatment effect is greatly affected by the hydraulic load, and the filter is easy to block, greatly improving the treatment efficiency and improving the operating conditions, and on the other hand, it has the advantages of simple management and infrastructure and low operating costs

Images